Stepped piston two-stroke engines

Details Stepped piston two-stroke engines Stepped piston two-stroke engines

1978-09-21

1980-07-01

Burns, Wendell E.

Internal-combustion engines

Two-cycle

Whirl through piston-controlled ports

123 59BS, 123 66, 123 67, 123 71R, F02B 7502

Patent

active

042101085

ABSTRACT:
A two-stroke internal combustion engine having a stepped piston in which the cylinder casting has a bore of greater diameter to form a pumping part, a bore of lesser diameter to form a working part, exhaust port means in the working part and opposed transfer port means on opposite sides of the working part disposed symmetrically about a plane passing through the longitudinal axis of the cylinder and center of the exhaust port means, the transfer port means being of a form to be produced in the casting process by non-separate cores introduced linearly towards the plane.

REFERENCES:
patent: 1040153 (1912-10-01), Crothers
patent: 1139770 (1915-05-01), Joswich
patent: 1907354 (1933-05-01), Hansen
patent: 1933002 (1933-10-01), Beyer
patent: 3550569 (1970-12-01), Hooper
patent: 4068629 (1978-01-01), Hooper

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